In diatomic species

Sumper, M. and Lehmann, G. (2006) Silica pattern formation in diatoms Species-specific polyamine biosynthesis. ChemBioChem, 7, 1419-1427. 

Kraft mill that had used elemental chlorine historically Microbial community and diatom species in lake sediments sampled from 2-8 cm depths Drop in the ATP content, depressed butyrate-esterase activity indicating toxicity to microorganisms, and reduction in diatom species richness Mika et al., 1999 [31]... 

NR activity is also sensitive to temperature, at least in diatom species. (Gao et al., 2000) demonstrated that NR activity in diatoms such as Skeletonema costatum tended to lose activity above 16°C, while other eukaryotic enzymes were stable at over 30° C. Lomas and Ghbert (1999) combined laboratory and field data to argue that this temperature sensitivity effectively Hmited diatoms to particular environments. Berges et al. (2002) speculated that features of the N-terminus of the NR protein might be responsible for temperature sensitivity, and these appear to be home out in data from recent sequencing projects (AUen et al., 2005). 

The BDEs in diatomic species have usually been measured by spectroscopy or mass spectrometry. In the absence of data on the enthalpy function, the values at 0 K, D°(A-B), are converted to by the approximate equation ... 

CDCA, the only known Cd protein, was first identified in the model diatom T. weissflogii. Homolog genes have so far been found exclusively in diatom species [40,93]. They have also been found in all environmental samples that have been tested, suggesting that the use of Cd in CDCA likely accounts, at least partially, for the nutrient-like behavior of Cd in the oceans. 

When the above analysis is applied to a diatomic species such as HCl, only k = 0 is present since the only vibration present in such a molecule is the bond stretching vibration, which has a symmetry. Moreover, the rotational functions are spherical harmonics (which can be viewed as D l, m, K (Q,< >,X) functions with K = 0), so the K and K quantum numbers are identically zero. As a result, the product of 3-j symbols... 

These data can be used to obtain the value of the equilibrium constant at any temperature and this in turn can be used to calculate the degree of dissociation through the equation for the conceiiuation dependence of the constant on the two species for a single element, die monomer and the dimer, which coexist. Considering one mole of the diatomic species which dissociates to produce 2x moles of the monatomic gas, leaving (1 — jc) moles of the diatomic gas and producing a resultant total number of moles of (1 +jc) at a total pressure of P atmos, the equation for the equilibrium constant in terms of these conceiiU ations is... 

Despite its very simple electronic configuration (Is ) hydrogen can, paradoxically, exist in over 50 different forms most of which have been well characterized. This multiplicity of forms arises firstly from the existence of atomic, molecular and ionized species in the gas phase H, H2, H+, H , H2" ", H3+. .., H11 + secondly, from the existence of three isotopes, jH, jH(D) and jH(T), and correspondingly of D, D2, HD, DT, etc. and, finally, from the existence of nuclear spin isomers for the homonuclear diatomic species. 

The lower halides of Bi are rather different. The diatomic species BiX (X = Cl, Br, I) occur in the equilibrium vapour above heated Bi-BiX3 mixtures. A black crystalline lower chloride of composition BiCli.iev is obtained by heating Bi-BiCls mixtures to 325° and cooling them during 1-2 weeks to 270° before removing excess BiC by sublimation or extraction into... 

Hence, the problem is reduced to whether g(co) has its maximum on the wings or not. Any model able to demonstrate that such a maximum exists for some reason can explain the Poley absorption as well. An example was given recently [77] in the frame of a modified impact theory, which considers instantaneous collisions as a non-Poissonian random process [76]. Under definite conditions discussed at the end of Chapter 1 the negative loop in Kj(t) behaviour at long times is obtained, which is reflected by a maximum in its spectrum. Insofar as this maximum appears in g(co), it is exhibited in IR and FIR spectra as well. Other reasons for their appearance are not excluded. Complex formation, changing hindered rotation of diatomic species to libration, is one of the most reasonable. 

To sum up, the difference between "triple bonding in the diatomic species SiO or SiS and "double" bonding in Si02 or SiS2 is small with respect to small distortions from the equilibrium distance (f and r), while they differ for large separations of the atoms involved (bond energy). This... 

Detailed investigation of T. rotula and other diatom species revealed that 2,4-decadienal (24) and 2,4,7-decatrienal (27) represent only members of a structurally diverse class of oc, 3,y,6-unsaturated aldehydes found in several... 

Indeed, it is worth noting that by itself, a permeation rate proportional to p°50 could be consistent with any value whatever for the ratio of monatomic to diatomic species in the solid, if the diatomic species is very immobile. For in such case, the permeation flux would be carried entirely by the monatomic species, whose concentration always goes as p0 50. However, a sizable diatomic fraction would significantly modify the transient behavior of the permeation after a change in gas pressure. Although neither Van Wieringen and Warmholtz nor Frank and Thomas published details of the fit of their observed transients to the predictions of diffusion theory, it is unlikely that any large discrepancies would have escaped their attention. 

---